2019 GMC Sierra 1500 POWER TRAIN,ENGINE

I live in Illinois, my 2019 GMC Sierra 1500 SLT has 51,318 miles on it as of 12/31/2025. What component or system failed or malfunctioned, and is it available for inspection upon request? Engine Oil Cooler hose line detaching from crimp - small oil leak currently. Not yet fixed. Available for inspection. How was your safety or the safety of others put at risk? If this component fails, all oil from the vehicle will be lost and inoperable. This could cause a traffic accident, especially if towing a load. Has the problem been reproduced or confirmed by a dealer or independent service center? Confirmed by an independent service center. I will be taking my vehicle to the local GMC service center for additional confirmations. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No, but GM has acknowledged the issue through these customer satisfaction surveys (CSP XXX/ XXX). Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There has been no failure yet. A small oil leak was found on my garage floor. My issue is that this is a known issue in cold weather climates. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On Wednesday, January 7th, 2026, my wife and I were traveling North on the Northeast Extension of the Pennsylvania Turnpike (476) at approximately 9:00 pm. A check engine light came on with no other symptoms, we start to get off the next exit. While still on the highway, the motor turns off with a warning to put it in neutral and restart. It would not restart and coasted off the exit and into a convenience store parking lot. There was noise, just turned off. We got stuck in the town for over 2 days before getting a tow 209 miles to the mechanic shop. We were miles from any mechanic shop and tried to troubleshoot while waiting and to no avail. First mechanic had to send it to a second because it looked like the engine had seized and that was confirmed at the second mechanic shop. Apparently the bearings in the lower end seized. The only thing they could offer was to replace the motor. It had proper amounts of fluids and didn't overheat. The motor replacement is approximately $10,800.00 in addition to having no vehicle there was additional towing and breakdown expenses (food and lodging for 2 nights and 3 days)

I am an owner of the same year, and model GMC Sierra 1500 included in the GM Customer Satisfaction Program N212326940, which is the oil cooler line failure. However, my VIN was not included in the program despite experiencing the exact same failure the program covers. My safety and the safety of others is put at risk because the failure may cause an immediate loss of oil pressure or propulsion while driving. This is a huge safety hazard, since loss of vehicle control may occur. My vehicle has been inspected by a certified GM dealer and they confirmed the oil cooler line has failed and must be replaced. I have not experienced any warning lights, but my vehicle is leaking an excessive amount of oil. The vehicle is no longer safe to drive until repaired.

With 115000 miles on it, I felt a clunk when it went in to gear. I took it to the dealer 3 times to have the mechanic drive it. He said it sounded and felt right. The the transmission blew and I had to have it replaced to the tune of 4800 dollars. 2 weeks after that the engine blew and I had to have that replaces for 17000 dollars. I really like my pickup but this seems a bit excessive. The 5.3 engine isn't good for that year

Less then 47 000 miles on truck, Used for only city driving, no off road driving or rigorous travel. - engine malfunction and could have had catastrophic failure while traveling causing injury to myself or others. -Car is inoperable, dealer recommend not to drive it due to safety concerns. -I have metal shavings in the oil, misfires, and a P0011 code. These match the known GM lifter/camshaft failure pattern. Vehicle started skipping check engine light turned on for cam shaft interrupter magnet. GM has open recall for 2021-2025 engine However 2019 vehicle is still under investigation.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle would intermittently hesitate upon depression of the accelerator pedal. The contact also stated that the check engine warning light had flashed on the instrument panel. The contact took the vehicle to an independent mechanic, where the mechanic informed the contact that there was a miscommunication between the engine and the transmission. Two dealers were notified of the failure, and each informed the contact that there were no recalls on the vehicle. The contact was also given a diagnostic fee to determine the cause of the failure; however, the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

The engine lost all power while driving down the road and code says p0016 Truck is now at a GMC service station being torn down

valve train/camshaft fairlure which damaged entire engine - happened at 99,650 miles

Engine failure on 12/1/2025 16,253 miles and 591.9 hours on vehicle. Vehicle has the 6.2l engine. Towed to dealership

I am reporting a serious mechanical and safety issue with my 2019 GMC Sierra 1500 (5.3L engine). The truck began misfiring, running rough, and would frequently “jump” and shut off while driving — creating an unsafe situation on the road. We attempted several repairs to resolve the issue: •Transmission flush •Replaced the intake manifold gasket •Replaced all eight fuel injectors •Inspected all ignition coils •Replaced faulty sensors The vehicle repeatedly showed a Cylinder 8 misfire, even after these repairs. Eventually, it was diagnosed that both the lifters and camshaft are bad, and the engine now needs a full replacement. This is extremely concerning because the truck has only about 47,000 miles on it. We brought it to the dealership in September 2024, while it was still under warranty, and told them it wasn’t running right. The dealership said there was nothing wrong. Now that the warranty has expired, GM is refusing to help with any repairs. This appears to be a manufacturing defect that was not properly diagnosed while under warranty. Engine failure at such low mileage, especially with early warning signs and repeated diagnostic errors, should be investigated as a serious reliability and safety concern.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the transmission unintentionally downshifted into first gear. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to a dealer, and it was diagnosed and determined that the torque converter needed to be replaced. The vehicle was repaired; however, the failure persisted. The vehicle was towed back to the dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was repaired; however, the failure persisted. The manufacturer was notified of the failure. The failure mileage was approximately 86,000.

While driving down the highway I experienced a sudden lose of power with check engine and other associated warning lights immediately illuminated. It has been confirmed by my independent service center and a GMC dealer that the engine lifters and camshaft failed. I have documentation to prove the vehicle has been traded to a GMC dealer. My safety and the safety of other divers around me was put at risk as I abruptly lost power at highway speeds and this caused traffic around me to slow very quickly and swerve to avoid collision. Serious personal and public injury or death was narrowly avoided due to the quick response of other drivers. I had to limp the vehicle to a safe place to exit the highway and avoid further danger. After speaking with the dealer and my independent maintenance professional I can say that the problem was showing eminent failure, for about a year there was a tik I was hearing that in the past had been described as the "GM TIK" some mechanics said it was normal others said it might be a problem but none of them ever recommended a repair. I believe this is related to the problem reported by my local news agency on 4/30/2025

Unknown mostly. Water pump ended up cracking while running. Power failure notice had come up on dash and then vehicle shut off while running. Dealership made repairs but unable to identify root cause.

Right lifter went out & damaged the CAM Shaft which in turn damaged the engine The vehicle has been sitting at the dealership since August 1, 2024 & confirmed on August 9, 2024, stating that a new CAM shaft would need replaced or a new engine, which ever we choose. NOTE: Vehicle only has 40,298 miles on it I was driving to work on August 1, 2024, service engine light came on & was blinking & the breaking system lights came on, this was the only warning that I received.

Oil cooler line detached from crimp while driving at highway speeds forcing the vehicle to an emergency stop on the side of the road. All oil pressure was lost immediately and entire underside of vehicle including tires, brakes, and wheels were all coated in oil. Known issue for same year, make, and model that has already been listed from NHTSA. But, apparently this VIN was not in the affected range.

TL* THE CONTACT OWNS A 2019 GMC SIERRA 1500. WHILE ATTEMPTING TO ACCELERATE AT HIGHWAY SPEEDS ABOVE 50 MPH, THE SPEED WOULD NOT IMMEDIATELY INCREASE AND THE VEHICLE DRASTICALLY HESITATED TO ACCELERATE. THE FAILURE OCCURRED IN SIXTH, SEVENTH, AND EIGHTH GEARS. THE VEHICLE WAS TAKEN TO ANCIRA GMC (30500 I-10 W, BOERNE, TX) WHERE THE FAILURE WAS DUPLICATED. THE CONTACT WAS INFORMED THAT THE VEHICLE WAS OPERATING NORMALLY. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 1,800.